Grini Millegi was a gangster of the Dowutin species, connected to Ciddarin Scaleback as an associate.
During the early years of the Galactic Empire's reign, he was in charge of Riot Racing on the planet Serolonis. Being aware of Scaleback's dubious reputation, Millegi harbored distrust towards her, leading to a rivalry between them concerning the racers they supported. Jet Venim, a Nosaurian racer, received Millegi's personal backing.
When Scaleback arrived to observe some races, supporting the droid pilot TAY-0, Millegi proposed a wager, which he ultimately won when Venim caused TAY-0 to crash, securing victory. Upon his attempt to collect, Scaleback confessed to lacking the agreed-upon funds, prompting Millegi's companions, specifically the Trandoshan Garnac and a Gamorrean individual, to prepare for a confrontation, while Scaleback's associates, Tech, Wrecker, and Omega, braced themselves for a fight. Eventually, Millegi agreed to a double-or-nothing bet, taking Scaleback into custody in the interim. With TAY-0 unable to race, Tech took his place and surprisingly won. When Tech, Wrecker, and Omega arrived to receive their winnings, Millegi fulfilled the payment as agreed. When Venim, having lost to Tech, attempted to draw his A140 blaster pistol, Millegi intervened. Before the clones departed, Millegi cautioned them against trusting Scaleback, advising them to remain vigilant in their dealings with her. His warning proved accurate months later when Scaleback betrayed the clones to Royce Hemlock, resulting in Omega's capture.
The voice actor for Grini Millegi is Ernie Hudson.